Abstract: Various embodiments include a cooled cooling-air system including: an inlet hot fluid conduit fluidly connected with a hot air source from a turbomachine; an inlet cold fluid conduit fluidly connected with a cold fluid source, the cold fluid source having a lower temperature than the hot air source; and a first thermoelectric generator fluidly connected with the inlet hot fluid conduit and the inlet cold fluid conduit, the first thermoelectric generator for cooling the inlet hot fluid conduit and simultaneously generating an electrical output.

Abstract: A system includes a heat recovery steam generator (HRSG) including a first pressure economizer, a first pressure evaporator that may receive a first portion of a feed water from the first pressure economizer at a first pressure, a re-heat section that may receive the first portion of the feed water from the first pressure economizer as a first steam flow, and a flash system including a first flash vessel that may receive a second portion of the feed water from the first pressure economizer and to generate a first flash steam flow. The system may combine the first flash steam flow with the first steam flow of the feed water at a second pressure less than the first pressure.

Abstract: A system includes a heat recovery steam generator (HRSG) including a first pressure economizer, a first pressure evaporator that may receive a first portion of a feed water from the first pressure economizer at a first pressure, a re-heat section that may receive the first portion of the feed water from the first pressure economizer as a first steam flow, and a flash system including a first flash vessel that may receive a second portion of the feed water from the first pressure economizer and to generate a first flash steam flow. The system may combine the first flash steam flow with the first steam flow of the feed water at a second pressure less than the first pressure.

Abstract: Various embodiments include a cooled cooling-air system including: an inlet hot fluid conduit fluidly connected with a hot air source from a turbomachine; an inlet cold fluid conduit fluidly connected with a cold fluid source, the cold fluid source having a lower temperature than the hot air source; and a first thermoelectric generator fluidly connected with the inlet hot fluid conduit and the inlet cold fluid conduit, the first thermoelectric generator for cooling the inlet hot fluid conduit and simultaneously generating an electrical output.

Abstract: A power plant includes a compressor configured to compress inlet air for combustion. The power plant also includes an air separation unit configured to receive and remove nitrogen from an air supply. The power plant further includes a fluid manipulator operably coupled to the air separation unit and the compressor, wherein the fluid manipulator is configured to receive nitrogen removed from the air separation unit at an inlet pressure and an inlet temperature and produce a modified pressure and a modified temperature of the nitrogen prior to selectively delivering the nitrogen to the compressor.

Abstract: A nitrogen source supplies a flow of nitrogen to a cooling circuit in the turbine section of a gas turbine. The nitrogen in the cooling circuit absorbs heat from the turbine section and flows to a flow divider where the heated nitrogen is split into a combustor flow and a return flow. The combustor nitrogen flow is injected into the gas turbine combustor. The return nitrogen flow is returned to the flow of nitrogen supplied to the gas turbine cooling circuit.

Abstract: The present application provides an integrated gasification combined cycle system. The integrated gasification combined cycle system may include a nitrogen source, a combustor, and a turbine. A flow of nitrogen from the nitrogen source passes through and cools the turbine and then flows into the combustor.

Abstract: A system capable of both increasing warm day output and maintaining compressor operating margin across the ambient and load range of a gas turbine combined cycle installation. The proposed solution takes advantage of the fact that both goals can be satisfied by manipulation of compressor inlet air temperature. Specifically, the system is designed to heat inlet air as may be required to maintain safe compressor operating margin at low ambient air temperatures or when burning dilute fuels. In the alternative, the system is designed to cool inlet air on warm days.

Abstract: A system for controlling steam temperature that includes steam circuit including a reheater circuit, at least one reheater dilution region, at least one reheater dilution conduit, and at least one reheater supply region disposed upstream of the at least one reheater dilution region, wherein the at least one reheater supply region and the at least one reheater dilution region are associated via the reheater circuit and the at least one reheater dilution conduit.

Abstract: A combined cycle system includes gas and steam turbines, a saturator and a fuel gas superheater for supplying moisturized heated fuel gas to the gas turbine, a gas turbine exhaust heat recovery system for generating steam and heating water for the superheater and a saturator heater for a recycle water conduit. A constant ratio of water supplied to the fuel gas saturator to dry fuel gas supplied to the fuel gas saturator and Wobbe number is maintained by adjusting the flow of the recycle water stream. Additional properties of the moisturized fuel gas, such as temperature, moisture content, composition, and heating value, are also used to control the water recycle stream to supply consistent moisturized fuel gas to the gas turbine system.